They find some sort of spike or bone

If it’s a spike, could it be part of an old sailing ship like the one Gary Drayton found in the swamp in Season 4? Or could it be something else altogether? Part of a treasure vault perhaps? If it’s a bone, is it human?

In the premiere sneak peek on Thursday we also saw that the team plan to put a camera back down the C-1 shaft in a bid to find the “shiny gold object” seen down there in Season 3.

The description released for the season premiere says that a “daring dive” takes place during that episode. Could the diver seen in the footage also be going down into the C-1 shaft?

There’s potential disaster

The trailers show a potentially serious accident taking place during the season when someone is blasted by what looks like an out-of-control high-pressure hose. He is then seen collapsed on the ground as others rush to his aid.

One scene also showed an ambulance being driven on to the island, with a female paramedic then seen closing the back door of the vehicle as if they are taking someone away.

The description for the season premiere also says that “peril strikes” during the dive, which suggests there may be more than one accident during the season.

A cave gets explored

One scene shown in the trailers reveals Rick exploring a cave by torchlight. Another shot sees light being shone at what looks like a Templar cross etched into a wall — although by the looks of the wall it is not the same one as in the cave.

A pit with wooden beams gets excavated

The team in the wood-lined pit with the excavator seen off to the right

The Season 5 photos include one of the team standing in a large excavated pit which appears to have been lined with old wooden beams.

A second photo taken in the same place shows Rick looking intently at something in his hands with an old ladder protruding from the ground behind him, while a third shows him handing something to Marty.

A huge boulder gets uncovered

One scene in the trailers shows Marty at the controls of an excavator as he removes a huge boulder from the ground — which appears to have one flat side.

He said: “This has been…since I’ve been doing this, the most exciting and eventful time I’ve ever spent on the island. You’re going to love Season 5.”

There could be more to come!

Local resident Karen Publicover told last week how filming was still taking place on the island “on a daily basis”. That suggests that the discoveries that prompted the rumors about big finds took place before the season has even wrapped — meaning there could be even more to come.

We’ll raise a glass of Dr. Pepper or Crown Royal to that!

The Curse of Oak Island returns to History for Season 5 this Tuesday, November 7, at 9/8c.